Application of near infrared spectroscopy for estimating available nitrogen in poultry manure compost

doi:10.1111/j.1747-0765.2007.00109.x

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Wiley InterScience

Soil Science & Plant Nutrition

Volume 53 Issue 1, Pages 102 - 107

Published Online: 11 Jan 2007

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SHORT PAPER

Application of near infrared spectroscopy for estimating available nitrogen in poultry manure compost

Takayuki FUJIWARA ¹ and Keiichi MURAKAMI ¹

¹ Agricultural Research Division, Mie Prefectural Science and Technology Promotion Center, Matsusaka, 515-2316 Japan

Correspondence: T. FUJIWARA, Agricultural Research Division, Mie Prefectural Science and Technology Promotion Center, 5-5-45 Takajaya, Tsu, Mie, 514-0819 Japan. Email: fujiwt02@pref.mie.jp

KEYWORDS

available nitrogen • near infrared spectroscopy • poultry manure compost • total nitrogen • uric acid

Abstract

The objective of this study was to develop an easy method of estimating available nitrogen in poultry manure compost using near infrared spectroscopy (NIRS). A scanning monochromator was used to obtain the reflectance spectra from 1,100 to 2,500 nm of samples of dried and milled poultry manure compost. Second derivative spectra and multiple regression analysis were used to develop calibration equations for total nitrogen (T-N) and uric acid nitrogen (UA-N). Standard error of prediction (SEP) of the best calibrations for T-N and UA-N were 4.74 mg g⁻¹ and 4.32 mg g⁻¹, respectively. The correlation between available nitrogen, which was obtained using incubation experiments, and UA-N in the compost samples was extremely high (r = 0.99999, SE = 0.61 mg g⁻¹). In conclusion, the estimation of available nitrogen from UA-N values using NIRS is a practical method of analyzing poultry manure compost.

Received 7 June 2006. Accepted for publication 6 October 2006.

DIGITAL OBJECT IDENTIFIER (DOI)

10.1111/j.1747-0765.2007.00109.x About DOI